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BRG1 regulation by miR-155 in human leukemia and lymphoma cell lines

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An Expression of Concern to this article was published on 26 July 2019

A Correction to this article was published on 26 July 2019

This article has been updated

Abstract

Introduction/purpose

BRG1 is a key regulator of leukemia stem cells. Indeed, it has been observed that this type of cells is unable to divide, survive and develop new tumors when BRG1 is down-regulated.

Materials and methods

We assessed BRG1 and miR-155 expression in 23 leukemia cell lines, and two no pathological lymphocyte samples using qPCR. MiR-155 transfection and western blot were used to analyze the relationship between miR-155 and its validated target, BRG1, by measuring protein expression levels. The effect of miR-155 on cell proliferation and prednisolone sensitivity were studied with resazurin assay.

Results

BRG1 expression levels could correlate negatively with miR-155 expression levels, at least in Burkitt’s lymphoma and diffuse large B cell lymphoma (DLBCL) cell lines. To clarify the role of miR-155 in the regulation of BRG1 expression, we administrated miR-155 mimics in different leukemia/lymphoma cell lines. Our results suggest that miR-155 regulate negatively and significantly the BRG1 expression at least in the MOLT4 cell line.

Conclusion

Our study revealed a previously unknown miR-155 heterogeneity that could result in differences in the treatment with miRNAs in our attempt to inhibit BRG1. However, the expression levels of BRG1 and miR-155, before prednisolone treatment were not statistically significantly associated prednisolone sensitive leukemia cells.

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Change history

  • 26 July 2019

    Upon publication, it came to our attention that certain revisions were necessary to honor the agreement between University of Hawaii and APEC Climate Center for the project, ���Development of APCC Seamless Prediction System���. There are three sections that are to be corrected to accurately reflect the agreement of project.

  • 26 July 2019

    Upon publication, it came to our attention that certain revisions were necessary to honor the agreement between University of Hawaii and APEC Climate Center for the project, ���Development of APCC Seamless Prediction System���. There are three sections that are to be corrected to accurately reflect the agreement of project.

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Correspondence to P. P. Medina.

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Conflict of interest

The authors declare that they have no conflict of interest. All data are true and accurate to the knowledge of the authors.

Research involving human participants and/or animals

This article does not contain any studies with human participants or animals performed by any of the authors.

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This article does not contain any studies with human participants performed by any of the authors. Therefore, informed consent is not included.

Funding

PM’s lab is funded by the Ministry of Economy of Spain (SAF2015-67919-R), Junta de Andalucía (P12-BIO-1655), the Deutsche José Carreras Leukämie-Stiftung, BBVA Foundation, and Eduardo-Gallego Grant 2015 from Francisco Cobos Foundation and J. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.

Additional information

M. Cuadros and V. Sánchez-Martín contributed equally to this work.

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Cuadros, M., Sánchez-Martín, V., Herrera, A. et al. BRG1 regulation by miR-155 in human leukemia and lymphoma cell lines. Clin Transl Oncol 19, 1010–1017 (2017). https://doi.org/10.1007/s12094-017-1633-2

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  • DOI: https://doi.org/10.1007/s12094-017-1633-2

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